RIPADMIN questions

Mojn guys I'm currently having some problems with one of our servers being denied access permanently for abusive behaviour. It should be allowed to hammer my whois service as hard as it wants, so I need to change some of the parameters in RIPADMIN.acl - I guess... I've tried to find some hints about this in the documentation found on http://www.ripe.net/db/docs.html but with no result ;-( I found a workaround by changing the AC_* vaules ( "Access control" ) in rip.config, but there must be a way to allow a single host unlimited number of queries through the RIPADMIN database ? Regards, Peter